Explicitly render vulnerability details

This refactors the new `vulnerability-details` component to explicitly
render the markup for the various details of the vulnerability, without
going through an unnecessary transformation stage.

This is preferable (though more verbose) because different details are
rendered in different ways. Before, the template resembled the
[loop-switch sequence][2] anti-pattern, and adding special cases was
awkward.

The snapshot changes in this commit are simply whitespace changes and
added/missing HTML comments, resulting from the different conditional
rendering logic.

This addresses [issue 32039][1].

[1]: https://gitlab.com/gitlab-org/gitlab/issues/32039
[2]: https://en.wikipedia.org/wiki/Loop-switch_sequence